1. It has different tone for security, fire fighting, rescuing, engineering, clearing the way, protocol, siren and aerial defiance etc.

2. The products can matches with warning lightbar, with three lighting channels

3. The power amplifier circuit adopts high efficiency square (or annular) transformer and power tube with stable frequency and strong disturbance resistant performance. The technical indexes are in accordance with national standards.

4. Appearance of the main engine is elegant, steady, classical and decent, and can be freely chosen according to different powers.